WATCH: Mikey Musumeci’s gnarly leg lock leaves game Gantumur Bayanduuren in a world of pain

While Mikey Musumeci has a laundry list of highlight-reel performances under the ONE Championship banner, his dominant showing against Gantumur Bayanduuren is undoubtedly among his best.

Putting his ONE flyweight submission grappling world championship on the line, 'Darth Rigatoni' managed to snag the Mongolian's left leg. Twisting and turning it every which way he could, Bayanduuren refused to tap out, no matter how much pain he was in.

After 10 minutes, Bayanduuren earned a moral victory, going the distance with Musumeci, but all he was left with was a slew of gruesome injuries.

"Check out the insane duel between flyweight submission grappling king Mikey Musumeci and Combat Sambo World Champion Gantumur Bayanduuren at ONE Fight Night 6!"

Following the contest, ONE Championship Chairman and CEO Chatri Sityodtong revealed that Bayanduuren suffered a torn ACL, MCL, meniscus, and a broken ankle that would keep him on the shelf for at least 12 months.

Mikey Musumeci meets Kade Ruotolo in a champion vs. champion battle at ONE 168: Denver

After earning seven straight wins inside the Circle, Mikey Musumeci will face his toughest test yet on Friday, Sept. 6.

Emanating from Ball Arena in The Mile High City, ONE 168: Denver will see Musumeci move up three weight classes to challenge current ONE lightweight submission grappling world champion Kade Ruotolo in perhaps the biggest submission grappling matches in ONE Championship history.

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Despite competing in the high altitude of Denver, Colorado against one of the most accomplished grapplers on the plenty, 'Darth Rigatoni' is more than confident will hold up — even when he's 5,280 feet above sea level.

"I'm known for my constant pressure and my tank," Musumeci told ONE. "I have, not to blow my own horn here, but I feel I have the best cardio ever. Especially, in Denver, Colorado, I think this is one of my biggest attributes."

Follow this link for tickets for ONE 168: Denver on Sept. 6 at Ball Arena.